>I think a 5000 would need a remote blower and lots of sound dampening
> measures to be a quiet desk-top amp.
Yes, at its full ratings. At 1500-2500W PEP you can use a low speed blower
and a fat wheel and not even hear it. It takes a lot of power to even heat
up the thermal mass of the anode when its loafing. Plus the grid is bolted
right to the chassis; no socket with this tube.
>
>
> Other than more complexity, why hasn't the practice of using switched
> band specific ( or range specific ) plate dc chokes been used to
> prevent nasty resonances ...... Especially post WARC ?
>
> Don WA4NPL
Not many want to either pay for a Model 86/85 switch with an extra wafer
just to switch vacuum relays or get complex with a chain drive to a seperate
phenolic switch.
With the old Centralab JVC 9000 series, (Electroswitch as used in current
amps) you have an oddball 36* index. You could buy the matching input switch
from Ameritron and gang it to both control the choke relays and a relay
controlled input board with its 2 wafers.
Carl
KM1H
>
>
>
>> Carl has me pretty well convinced that I want to try building up a
>> 3CX5000 due to the extremely low IM products (in the mid -50 db range)
>> where the more common tubes are happy to be in the mid to upper - 30 db
>> range
>
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